JP2019051245A - Tape type disposable diaper - Google Patents

Abstract

To provide a tape type disposable diaper equipped with integral type wing parts which can prevent generation of waste materials and are excellent in fitting property around legs.SOLUTION: In a tape type disposable diaper 10, side flap parts SF have folding parts 82 folded to a central side in a width direction WD and are fixed on an opposite surface in the middle in a back and forth direction LD; parts continuing back sides of the folding parts 82 in the side flap parts SF are not fixed in a state folded to central side in the width direction but become widening parts 81 expandable sideways; a boundary between the folding part 82 and the widening parts 81 is at a position away forward from the connection tapes 13; fitting parts 13B in the connection tapes 13 are positioned at the widening parts 81; in an expanded state, the widening parts 81 become wing parts WP; and the wing parts WP have width change parts where expanded widths of the widening parts 81 become greater as they go to waist sides.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a so-called tape-type disposable diaper.

  There are mainly three types of disposable diapers: tape type, pants type, and pad type. Among these, the tape-type disposable diaper is worn by connecting the connecting portions provided on the left and right sides of the back portion to the outer surface of the abdominal portion after being applied to the body in the unfolded state.

  A general tape-type disposable diaper has a crotch part including a front-rear direction center, a ventral part extending forward from the front-rear center, and a back part extending rearward from the front-rear center, at least the back part is The wing portion extends to the left and right sides in the width direction from the crotch portion, the ventral portion and the back portion have an intermediate portion located between the left and right wing portions, and the wing portion is an outer surface of the ventral portion. It has the connection part connected so that attachment or detachment is possible. In use, the wing portion is turned from both sides of the waist to the outer surface of the abdominal portion, and the connecting portion of the wing portion is connected to the outer surface of the abdominal portion. Such a tape-type disposable diaper is used not only for infants but also widely used for nursing care (adult use).

  Conventionally, as a tape-type disposable diaper, a side flap portion extending laterally from the side edge of the absorbent body is cut out along the leg circumference, and an uncut portion is left as a wing portion (for example, a patent) In addition to the document 1), a separate type of connecting tape manufactured separately on the side edge of the main body forming the intermediate portion and the connecting tape serving as a wing portion (for example, see Patent Documents 2 and 3) is known. ing. Further, as a separate type, there has been proposed a unit in which a unit including left and right wing portions is attached to a main body forming an intermediate portion (see, for example, Patent Document 4).

  However, as in the case of the above-described integrated type, when cutting is performed to form the wing portion, a separation piece (hereinafter also referred to as a trim) that requires disposal is generated, and the material is wasted (hereinafter referred to as a trim). Also called trim loss). Moreover, it is necessary to manufacture a connection tape separately in a separate type | mold, and not only a manufacturing process becomes complicated, but a structure also becomes complicated. Furthermore, when the lower edge of the connecting tape is a straight line along the width direction, the problem is that it does not fit around the leg. Cannot be avoided.

Japanese Patent Laid-Open No. 2006-174816 JP 2010-22550 A JP 2010-119463 A JP 2011-72736 A

  Accordingly, a main object of the present invention is to provide a tape-type disposable diaper having an integrated wing portion that can prevent generation of waste materials and has good fit with respect to the periphery of the leg.

Various aspects that have solved the above problems are as follows.
<First aspect>
Having a crotch portion including a front-rear direction center, a ventral portion extending frontward from the front-rear direction center, and a dorsal side portion extending rearward from the front-rear direction center,
Having an absorbent body built in a range including the crotch part,
On both sides in the width direction from the ventral portion to the dorsal portion, side flap portions not having the absorber,
At least the back side portion has a wing portion that extends to the left and right sides in the width direction from the crotch portion,
An attachment portion fixed to the wing portion; a tape free portion extending laterally from the attachment portion; and a connection tape having a connection portion for the ventral portion provided in the tape free portion;
In the mounted state, in the tape-type disposable diaper in which the connecting tape of the wing portion is connected to the outer surface of the ventral portion,
The side flap portion has a folded portion that is folded back to the center in the width direction and fixed to the facing surface in the middle in the front-rear direction,
The portion that continues to the rear side of the folded portion in the side flap portion is not fixed in a state folded back to the center in the width direction, and is a widened portion that can be expanded laterally.
The boundary between the folded portion and the widened portion is at a position away from the connecting tape to the front side,
The mounting portion in the connecting tape is located in the widened portion,
In the unfolded state, the widened portion becomes the wing portion, and the wing portion has a width changing portion that increases as the unfolded width of the widened portion goes toward the waist.
A tape-type disposable diaper characterized by that.

(Function and effect)
In this aspect, since the wing portion is formed by providing the folded portion and the widened portion in the side flap portion, it is not necessary to perform excision in order to form the wing portion even though the wing portion is integrated. Moreover, when the folded portion and the widened portion are provided in the side flap portion, the wing portion has a width changing portion in which the expanded width of the widened portion increases toward the waist side. Since the side edge of the width changing portion is obliquely upward toward the side, the side edge of the wing portion is along the leg circumference, and the fit to the leg circumference is good, and the buttock is more widely spread. It can be coated.

<Second aspect>
At least a part of the front side of the attachment portion in the connecting tape is fixed to the width changing portion,
In the unfolded state, due to the change in the unfolded width of the widened portion in the width varying portion, the attachment portion is contracted to the center in the width direction toward the front side, whereby the connecting tape is inclined downward toward the side.
The tape type disposable diaper of a 1st aspect.

(Function and effect)
In a tape-type disposable diaper, it is worn obliquely downward along the lower side of the bulge of the wearer's abdomen (that is, the direction in which the left and right connecting tapes are substantially V-shaped when viewed from the front, hereinafter simply referred to as diagonally downward). It may be preferable. This aspect is suitable for such a mounting form, and in the expanded state, the change in the expanded width of the widened portion in the width changing portion makes use of the fact that the attachment portion is contracted to the center in the width direction toward the front side, The direction of the connecting tape is obliquely downward toward the side. In other words, when the user pulls the connecting tape at the time of wearing, the direction of the connecting tape is naturally inclined downward, so that it becomes easy to connect the connecting tape obliquely downward along the lower side of the bulge of the wearer's abdomen. .

<Third Aspect>
The folded portion is provided up to the front end of the ventral portion, the front end portion of the folded portion is fixed to the opposing surface over the entire width direction, and the front and rear portions of the folded portion on the rear side of the front end portion Only the end on the center side in the width direction is fixed to the opposing surface continuously or intermittently in the direction,
The tape type disposable diaper of the 1st or 2nd aspect.

(Function and effect)
If the entire folded portion is fixed to the opposing surface in order to provide the folded portion in the side flap portion, the flexibility of the side flap portion may be impaired. On the other hand, if only the end portion on the center side in the width direction of the folded portion is fixed to the facing surface, the front end portion may open and the appearance may deteriorate. Therefore, it is preferable to be configured like this aspect.

<Fourth aspect>
A liquid-impermeable sheet covering the back side of the absorber;
An exterior sheet covering the back side of the liquid-impermeable sheet;
A root portion fixed to a region including the side flap portion, a protruding portion extending from the root portion, a lying portion in which both front and rear direction ends of the protruding portion are fixed in a lying state, and the front and rear of the protruding portions A gathering sheet having a gather sheet having an unfixed rising part located between the lying parts, and a gather elastic member fixed to at least a tip part of the rising part,
With
In the side flap portion, the gather sheet, the liquid-impermeable sheet, and the exterior sheet are laminated,
The folded portion and the widened portion include the side portion of the exterior sheet, do not include the liquid impermeable sheet, and the side edge of the liquid impermeable sheet is closer to the center in the width direction than the folded position of the folded portion. positioned,
The tape type disposable diaper of a 3rd aspect.

(Function and effect)
When the structure of the side flap part is configured as in this aspect, the liquid-impermeable sheet is not included in the folded part and the widened part, thereby increasing the number of laminated sheets in the side flap part, that is, air permeability and flexibility. Can be suppressed.

<Fifth aspect>
The folded portion and the widened portion do not include the gather sheet, and the side edge of the gather sheet is located on the center side in the width direction from the folded position of the folded portion.
The tape type disposable diaper of a 4th aspect.

(Function and effect)
By not only including a liquid-impermeable sheet but also a gather sheet in the folded portion and the widened portion as in this aspect, it is possible to further suppress a decrease in air permeability and flexibility of the side flap portion.

<Sixth aspect>
The gather sheet extends only to the end on the width direction center side of the folded portion,
The tape-type disposable diaper according to the fifth aspect.

(Function and effect)
As in this aspect, the flexibility of the side flap portion can be further improved by narrowing the width of the gather sheet.

<Seventh aspect>
The connection tape has an attachment portion fixed to the wing portion, a tape free portion extending laterally from the attachment portion, and a connection portion for the ventral portion provided in the tape free portion. ,
Over the part that overlaps the base end of both connecting tapes, a waist elastic sheet that expands and contracts in the width direction is provided,
The tape type disposable diaper of the 6th aspect.

(Function and effect)
As described above, when the width of the gather sheet is narrowed, the fixing portion of the connecting tape is likely to be located at a portion made only of the exterior sheet. In this case, the strength of the fixing portion of the connecting tape may be a problem. This problem can be solved by using a high-strength material for the exterior sheet. However, since many high-strength materials are inferior in flexibility, the exterior sheet has a natural appearance such as a cloth and a soft touch. Considering the purpose is not a preferred solution. On the other hand, when the waist stretchable sheet is arranged so as to overlap the attachment portions of both connection tapes as in this aspect, the portion to which force is applied during use, particularly the portion where the base end portion of the connection tape is attached Strength can be supplemented by a waist elastic sheet. Moreover, since the tightening force in the mounting state concentrated on the connecting tape and the tensile force at the time of mounting are directly transmitted to the waist stretchable sheet, the stretchability of the waist stretchable sheet is more suitably exhibited.

<Eighth aspect>
The connecting tape is fixed to a surface which is an outer surface in the expanded state in the widened portion,
The tape type disposable diaper of any one aspect of 4th-7th.

(Function and effect)
The connecting tape can be fixed to the inner surface in the expanded state in the widened portion, but depending on the material of the connecting tape, the touch may be deteriorated, so the outer surface in the expanded state in the widened portion as in this aspect. It is also preferable to fix to the surface.

  As described above, according to the present invention, it is possible to prevent the generation of waste materials and to provide advantages such as a tape-type disposable diaper having an integrated wing portion with good fit around the legs.

It is a top view which shows the inner surface of the tape-type disposable diaper of the expansion | deployment state. It is a top view which shows the outer surface of the tape-type disposable diaper of the expansion | deployment state. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG. (A) 7-7 sectional drawing of FIG. 1, (b) 8-8 sectional drawing of FIG. (A) The top view of a waist elastic sheet, (b) It is sectional drawing of a waist elastic sheet. (A) Top view of connecting tape, (b) Cross section of connecting tape It is a principal part enlarged view of FIG. FIG. 9 is a sectional view taken along line 9-9 in FIG. 1. It is sectional drawing which shows the principal part of the state which opened the connection tape. It is a front view which shows a mounting state It is sectional drawing of the folding | returning part which shows another form. It is sectional drawing of the folding | returning part which shows another form. It is sectional drawing of the wide part which shows another form. It is sectional drawing of the wide part which shows another form. It is a top view which shows the inner surface of the tape-type disposable diaper of the expansion | deployment state. It is a top view which shows the change at the time of manufacture. (A) Top view of connecting tape, (b) Cross section of connecting tape It is a top view which shows the inner surface of the tape-type disposable diaper of the expansion | deployment state. It is a top view which shows the outer surface of the tape-type disposable diaper of the expansion | deployment state.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In addition, the dot pattern portion in the cross-sectional view shows an adhesive as a joining means for joining the constituent members, and by applying solid, bead, curtain, summit, spiral, etc., such as hot melt adhesive, and the elastic elastic member The fixed portion is formed by coating on the outer peripheral surface of an elastic expansion / contraction member such as a comb gun or a shroud coating instead of or together with this. As a joining means for joining the constituent members, other adhesives may be used instead of the hot melt adhesive, or welding means such as heat sealing or ultrasonic sealing may be used.

  1 to 11 show an example of a tape-type disposable diaper 10. This tape-type disposable diaper 10 has a crotch portion including a center in the front-rear direction, a ventral portion F extending forward from the center in the front-rear direction, and a back portion B extending rearward from the center in the front-rear direction. The absorber 56 is built in the range including the part. Side flap portions SF that do not have the absorber 56 are formed on both sides in the width direction from the ventral portion F to the back portion B, and the back portion B extends to the left and right sides from the crotch portion. A wing portion WP is formed. And the wing part WP of the back part B has the connection tape 13 connected to the outer surface of the abdominal part F so that attachment or detachment is possible. In a mounted state, for example, as shown in FIG. The connecting tape 13 is connected to the outer surface of the ventral portion F. As shown in FIGS. 19 and 20, the ventral portion F is also formed with wing portions WP that extend to the left and right sides of the crotch portion, and the side edges of the side flap portions SF are along the legs. The middle of the LD can also be a constricted shape. In addition, a crotch part means the part corresponding to a wearer's crotch, and is a center part when the tape-type disposable diaper 10 of an expansion | deployment state is normally divided into three in the front-back direction LD.

  More specifically, the tape-type disposable diaper 10 of the present example has a main body portion MP that is defined as a width direction range corresponding to the absorbent body 56, and side flap portions SF that extend on both sides in the width direction of the main body portion MP. . The main body MP includes an absorbent body 56, a liquid-permeable top sheet 30 that covers the front side of the absorbent body 56, and a liquid-impermeable sheet 11 that covers the back side of the absorbent body 56. The end flap part EF which does not have the absorber 56 extended in the front side and back side rather than the absorber 56 is provided. The top sheet 30 and the liquid impermeable sheet 11 extend to the left and right side flap portions SF and the front and rear end flap portions EF, and the exterior sheet 12 covering the back surface of the liquid impermeable sheet 11 is a tape-type disposable diaper 10. The entire back surface is formed.

  Further, a rising gather 60 is provided on both sides of the surface of the tape-type disposable diaper 10 in the width direction WD. The gathering sheet 62 that forms the rising gather 60 is provided on the top sheet 30. It extends from both side parts to each side flap part SF.

Hereinafter, the material and the characteristic part of each part are demonstrated in order.
(Exterior sheet)
The exterior sheet 12 is provided in order to make the back surface of the disposable diaper 10 have a touch and appearance like cloth. The exterior sheet 12 is preferably a non-woven fabric, but is not limited thereto. The type of the nonwoven fabric is not particularly limited, and as the material fiber, for example, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, recycled fibers such as rayon or cupra, and natural fibers such as cotton are used. As a processing method, a spunlace method, a spunbond method, a thermal bond method, an air-through method, a needle punch method, or the like can be used. However, a long-fiber nonwoven fabric such as a spunbond nonwoven fabric, an SMS nonwoven fabric, or an SMMS nonwoven fabric is preferable in that both the touch and strength can be achieved. In addition to using a single nonwoven fabric, a plurality of nonwoven fabrics can be used. In the latter case, the nonwoven fabrics 12 are preferably bonded to each other with a hot melt adhesive or the like. When using a nonwoven fabric, the fabric weight is preferably 10 to 50 g / m ² , particularly 13 to 30 g / m ² . The exterior sheet | seat 12 can also be abbreviate | omitted and it can be set as the form which the liquid-impermeable sheet | seat 11 exposes to the back surface of the disposable diaper 10.

(Liquid impervious sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited. For example, the liquid-impermeable sheet 11 is substantially made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet, or a waterproof film. Non-woven fabrics that ensure liquid impermeability (in this case, liquid impervious sheets are composed of waterproof films and non-woven fabrics). Of course, in addition to this, materials having liquid impermeability and moisture permeability which have been used and used in recent years from the viewpoint of preventing stuffiness can also be exemplified. As the sheet of the material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and the sheet is formed, and then stretched in a uniaxial or biaxial direction. Examples of the microporous sheet obtained in this way can be given. In addition, non-woven fabric using micro-denier fiber, strengthening leakage resistance by reducing the voids of the fiber by applying heat or pressure, and applying water-repellent resin or hydrophobic resin or water repellent to waterproof A sheet that is liquid-impermeable without using a film can also be used as the liquid-impermeable sheet 11.

  The liquid-impermeable sheet 11 in the illustrated example has a rectangular shape and is slightly wider than the top sheet 30 and narrower than the exterior sheet 12, but the liquid-impermeable sheet is not limited thereto. 11 can be appropriately changed, for example, to have the same width as the exterior sheet 12.

(Top sheet)
As the top sheet 30, a liquid permeable material such as a porous or non-porous nonwoven fabric or a porous plastic sheet can be used. The nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, the spun lace method is a preferable processing method for obtaining flexibility and drapeability, and the thermal bond method is for obtaining bulkiness and softness.

  The top sheet 30 may be composed of one sheet or may be composed of a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

  Although the top sheet 30 in the illustrated example extends to the side of the side edge of the absorbent body 56, the top sheet 30 is not limited thereto, and may extend to the side edge of the exterior sheet 12. Then, as long as it rises to the root portion of the gather 60, it may be changed as appropriate, for example, it may extend only to the inside in the width direction WD from the side edge of the absorber 56.

(Intermediate sheet)
An intermediate sheet (also referred to as a second sheet) 40 can be provided between the top sheet 30 and the absorbent element 50 in order to move excrement that has passed through the top sheet 30 to the absorbent body and prevent reversal. This intermediate sheet 40 not only improves the absorption performance of the absorbent by quickly transferring the excrement to the absorber, but also prevents the excretion of the absorbed excrement from reversing from the absorber, and makes the surface of the top sheet 30 feel soft. It is what makes it better. The intermediate sheet 40 can be omitted.

  The material of the intermediate sheet 40 is not particularly limited, and for example, the same material as that of the top sheet 30 can be used. The intermediate sheet 40 is preferably bonded to the top sheet 30. When heat embossing or ultrasonic welding is used for the bonding, the material of the intermediate sheet 40 preferably has the same melting point as the top sheet 30. Further, considering the permeation of the solid content in the stool, the fineness of the fiber used for the intermediate sheet 40 is preferably 5.0 to 7.0 dtex, but the liquid residue in the top sheet 30 increases. On the other hand, when the fineness of the fiber used for the intermediate sheet 40 is 1.0 to 2.0 dtex, the liquid residue of the top sheet 30 hardly occurs, but the solid content of the stool is difficult to permeate. Therefore, it is preferable that the fiber of the nonwoven fabric used for the intermediate sheet 40 has a fineness of about 2.0 to 5.0 dtex. The intermediate sheet 40 may be a mesh film in which a large number of pores are provided in a film material such as polyethylene.

  The intermediate sheet 40 in the illustrated form is arranged in the center shorter than the width of the absorbent element 50, but may be provided over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the entire length of the diaper 10, may be the same as the length of the absorbent element 50, or may be within a short length range centered on the region that receives the liquid.

(Absorption element)
The absorption element 50 is a part that absorbs and holds liquid such as urine and loose stool. In the illustrated example, the absorption element 50 includes an absorbent body 56 and a packaging sheet 58 that wraps the entire absorbent body 56. The packaging sheet 58 can be omitted as necessary, for example, when the absorbent body 56 is excellent in shape maintenance, and in that case, the absorbent element 50 is composed of the absorbent body 56 alone. The absorbent element 50 can be adhered to the inner surface of the liquid-impermeable sheet 11 via an adhesive such as a hot melt adhesive on the back surface.

(Absorber)
The absorber 56 can be formed of an aggregate of fibers. As this fiber assembly, a filament assembly obtained by opening, as necessary, synthetic fiber tows (fiber bundles) such as cellulose acetate as well as short fibers such as cotton-like pulp and synthetic fibers Can also be used. The fiber basis weight can be set to, for example, about 100 to 300 g / m ² when cotton-like pulp or short fibers are stacked, and in the case of a filament aggregate, for example, about 30 to 120 g / m ^2. Can do. The fineness in the case of a synthetic fiber is 1-16 dtex, for example, Preferably it is 1-10 dtex, More preferably, it is 1-5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The degree of crimp of the crimped fibers can be, for example, about 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per 2.54 cm. Moreover, the crimped fiber crimped uniformly can be used. It is preferable to disperse and hold superabsorbent polymer particles in the absorber 56.

  It is preferable that the absorbent body 56 has a rectangular shape as in the illustrated example, and an hourglass shape having a narrow portion narrower than both the front and rear sides in the middle in the front-rear direction, because the fit around the legs is improved.

  Moreover, the dimension of the absorber 56 can be appropriately determined as long as it extends to the front, rear, left and right of the urination port position, but preferably extends to the vicinity of the periphery of the tape-type disposable diaper 10 in the front-rear direction LD and the width direction WD. In addition, the code | symbol 56X shows the full width of the absorber 56, the code | symbol 10X shows the full width of the tape type disposable diaper 10, and the code | symbol 10L shows the full length (it is equal to the full length of the diaper 10 in the illustration). Yes.

(Superabsorbent polymer particles)
The absorber 56 can contain superabsorbent polymer particles in a part or all thereof. Superabsorbent polymer particles include “powder” in addition to “particles”. As the superabsorbent polymer particles 54, those used in this type of absorbent article can be used as they are. The particle size of the superabsorbent polymer particles is not particularly limited, but for example, screening using a standard sieve (JIS Z8801-1: 2006) of 500 μm (shaking for 5 minutes), and particles falling under the screen by this screening When sieving (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1: 2006), the proportion of particles remaining on the 500 μm standard sieve is 30% by weight or less, and the 180 μm standard sieve It is desirable that the proportion of particles remaining on the surface is 60% by weight or more.

  The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. High-absorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and sodium carboxymethylcellulose crosslinks. Or an acrylic acid (salt) polymer can be used. As the shape of the superabsorbent polymer particles, a commonly used granular material is suitable, but other shapes can also be used.

  As the superabsorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less are preferably used. If the water absorption rate is too slow, a phenomenon that the liquid supplied into the absorber 56 returns to the outside of the absorber 56 (so-called reverse return) is likely to occur.

  Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. Thereby, even if it is a case where it is set as the bulky absorber 56, the sticky feeling after liquid absorption can be suppressed effectively.

The basis weight of the superabsorbent polymer particles can be appropriately determined according to the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be said unconditionally, it can be 50 to 350 g / m ² . If the amount of polymer is less than 50 g / m ^2, it is difficult to secure the absorption amount. When it exceeds 350 g / m ² , the effect is saturated.

(Packaging sheet)
When the packaging sheet 58 is used, as the material, tissue paper, particularly crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used. However, it is desirable that the superabsorbent polymer particles be a sheet that does not escape. When a nonwoven fabric is used in place of the crepe paper, a hydrophilic SMS nonwoven fabric (SMS, SSMMS, etc.) is particularly suitable, and the material can be polypropylene, polyethylene / polypropylene composite material, or the like. The basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

  The packaging form of the packaging sheet 58 can be determined as appropriate, but from the viewpoint of ease of manufacture and prevention of leakage of the superabsorbent polymer particles from the front and rear end edges, the cylinder is formed so as to surround the front and back surfaces and both side surfaces of the absorbent body 56. It is preferable that the front and rear edge portions protrude from the front and rear of the absorbent body 56, and the overlapping portion and the overlapping portion of the front and rear protruding portions are joined by a joining means such as hot melt adhesive or material welding.

(Side gather)
As shown in FIGS. 1 to 3, in order to improve the fit of the leg periphery portion, a side elastic member 70 extending in the front-rear direction LD is provided between the seat layers in the middle of the side flap portion SF in the front-rear direction, It is preferable that the portion having the side elastic member 70 is expanded and contracted in the front-rear direction LD by the expansion and contraction of the side elastic member 70. The side elastic member 70 is provided, for example, between the gather sheet 62 and the liquid impermeable sheet 11 as shown in FIG. 8, or between the folded portion 82 and the liquid impermeable sheet 11 described later as shown in FIG. As shown in FIG. 13, when the folded portion 82 has a plurality of sheet layers, they are provided between those sheet layers (in the illustrated example, between the gather sheet 62 and the exterior sheet 12). can do.

(Get up gather)
In order to block urine and soft stool that move laterally on the top sheet 30 and prevent lateral leakage, the surface of the disposable diaper 10 stands on the skin side from the side of the top sheet 30 on both sides in the width direction WD ( A protruding gather 60 is provided over the entire longitudinal direction.

  The rising gather 60 in the illustrated example has a root portion 65 fixed to a region including the side flap portion SF, a protruding portion 66 extending from the root portion 65, and both ends in the front-rear direction of the protruding portion are fixed in a lying state. Gathered portion 67, unfixed rising portion 68 located between the front and rear lodging portions of the projecting portion 66, and gather elasticity elastically fixed to at least the tip portion of the rising portion 68 in the front-rear direction. Member 63. The gathering gather 60 is formed by a gathered sheet 62 folded at the tip, and the gathering sheet 62 can be made of a water-repellent non-woven fabric. Can be used. As shown in FIGS. 1 to 3, a plurality of gathered elastic members 63 can be provided, and a plurality of gathered elastic members 63 can be provided at intervals. Although the elongation rate of the part which has the gather elastic member 63 is not specifically limited, 150-350% is preferable in normal cases, and 200-300% is more preferable.

  The root portion 65 of the rising gather 60 in the illustrated example is provided only in the side flap portion SF, and is joined to the side portion of the liquid-impermeable sheet 11 and the side portion of the exterior sheet 12, but the side flap portion SF. May extend to the side of the region overlapping the absorber 56.

  The projecting portion 66 of the rising gather 60 has a lying portion 67 at both ends in the front-rear direction LD, but the portion between them is an unfixed rising portion 68, and this rising portion 68 is the gather elastic member 63. It comes to stand by contraction force. When the diaper 10 is mounted, the diaper 10 is mounted on the body in the shape of a boat, and the contraction force of the gather elastic member 63 acts, so that the gather 60 rises up due to the contraction force of the gather elastic member 63, and elastically moves around the legs. Close contact with. As a result, so-called side leakage from around the legs is prevented.

(Waist elastic sheet)
It is preferable that the back-side portion B is provided with a belt-like waist stretchable sheet 90 and the back-side portion B is elastically stretched in the width direction WD. For example, as shown in FIG. 6, the waist stretchable sheet 90 has non-stretchable regions 96 at both ends in the width direction WD, and a portion between these non-stretchable regions 96 is an intermediate stretchable stretchable in the width direction WD. It may be the region 95. The waist stretchable sheet 90 may be located only in the end flap portion EF, but when the waist stretchable sheet 90 is disposed so as to extend from the end flap portion EF to the rear end portion of the absorber 56 as illustrated, the absorber 56. This is preferable because the rear end is firmly pressed against the body.

  The waist elastic sheet 90 may use a sheet-like elastic member such as a rubber sheet, but it is preferable to use a nonwoven fabric from the viewpoint of air permeability. In this case, a sheet-like elastic member having air permeability such as a stretchable nonwoven fabric can be used. However, as shown in FIG. 6, a sheet layer 91 such as two nonwoven fabrics is pasted with an adhesive such as a hot melt adhesive. In addition, a material in which an elastic member 92 such as a perforated sheet, net, or elongated (thread or string) is fixed between the sheet layers 91 in a state of extending along the width direction WD is preferably used. . In this case, as the material of the sheet layer 91, the same material as the exterior sheet 12 can be used. The elongation rate of the elastic member 92 is preferably about 150 to 250%. In addition, when an elongated member (thread-like or string-like) is used as the elastic member 92, it is preferable to provide about 5 to 15 pieces having a thickness of 420 to 1120 dtex with a spacing of 3 to 10 mm in the front-rear direction.

  Although the width of the waist elastic sheet 90 can be determined as appropriate, it is preferably a width extending between the left and right side flap portions SF as shown in the illustrated example, and particularly a width extending between the left and right wing portions WP. It is preferable.

  Although the dimensions of the intermediate stretchable region 95 and the non-stretchable region 96 in the waist stretchable sheet 90 can be appropriately determined, the width of the intermediate stretchable region 95 is 30 to 100% of the width between the connecting portions 13A of the left and right connecting tapes 13 described later. Preferably, the width of the non-stretchable region 96 is preferably about 5 to 20 mm in order to prevent shrinkage or turning over during installation. The non-stretchable region 96 may be a region that does not have the elastic member 92. However, as described in Patent Document 3, the elastic member 92 is attached over the intermediate stretchable region 95 and the non-stretchable region 96, and in the non-stretchable region 96, the elastic member 92 is attached. The elastic member 92 may remain in the non-stretchable region 96, for example, or may be structured so as not to stretch or contract at all.

  Further, the elastic member 92 may be arranged so that a part of the elastic member 92 crosses the absorber 56. However, as shown in FIG. Therefore, if the structure is such that the elastic member 92 remains but hardly or does not expand or contract at all, the rear end portion of the absorbent body 56 does not contract in the width direction, so that the fit is further improved.

  The waist stretchable sheet 90 is disposed between the liquid-impermeable sheet 11 and the absorbent element 50 in the illustrated form, but is not particularly limited to this arrangement. For example, the waist stretchable sheet 90 may be disposed between the liquid-impermeable sheet 11 and the exterior sheet 12 or may be provided outside the exterior sheet 12. When the exterior sheet 12 is formed by stacking a plurality of sheet layers, the entire waist elastic sheet 90 may be provided between the sheet layers of the exterior sheet 12.

(Connecting tape)
The connecting tape 13 is provided in the wing portion WP. As shown in FIG. 7, the connecting portion 13B attached to the wing portion WP, the tape free portion 13F extending from the attaching portion 13B to the side, It has the connection part 13A provided in the tape free part 13F so that attachment or detachment is possible with respect to the outer surface of the abdominal part F.

  As a connecting portion 13A of the connecting tape 13, a hook material (male material) of a mechanical fastener (surface fastener) may be provided, or an adhesive layer may be provided. The hook material has a large number of engaging protrusions on its connecting surface, and the engaging protrusions are (A) letter-shaped, (B) J-shaped, (C) mushroom-shaped, (D) There are T-shape, (E) double J-shape (shape in which J-shape is joined back to back), etc., but any shape may be used. When the diaper 10 is mounted, the connecting tape 13 is turned from both sides of the waist to the outer surface of the abdominal portion F, and the connecting portion 13A of the connecting tape 13 is connected to an appropriate position on the outer surface of the abdominal portion F.

  As shown in FIG. 7, the connecting tape 13 is not only a non-stretchable type (tab type) having no stretchable region, but also at least a portion between the attachment portion 13B and the connecting portion 13A as shown in FIG. An expansion / contraction type (side panel type) having a tape expansion / contraction region 13E that expands and contracts in the width direction WD can also be employed.

The structure of the non-stretchable connecting tape 13 is not particularly limited, and a known one can be used. The non-stretchable type connecting tape 13 in the illustrated example has a support piece 13C having a part that can protrude sideways, and a connecting part 13A provided on the part that can protrude from the support piece 13C. As a material of the support piece 13C, a known material such as a nonwoven fabric, a plastic film, a polylaminated nonwoven fabric, paper, or a composite material thereof can be used without particular limitation, but the fineness is 1.0 to 3.5 dtex, and the basis weight is 20 to 100 g / m. ^2. Spunbond nonwoven fabric, air-through nonwoven fabric, or spunlace nonwoven fabric having a thickness of 1 mm or less is preferred.

  Although the expansion ratio of the tape expansion / contraction area | region 13E in the expansion-contraction type connection tape 13 is not specifically limited, It is preferable that it is about 150 to 250%. The structure of the tape stretchable region 13E is not particularly limited. For example, at least the tape stretchable region 13E in the connecting tape can be formed using a sheet having elasticity by itself such as a rubber sheet or a stretchable nonwoven fabric. . Further, as illustrated in FIG. 18, two sheet layers 13 </ b> S such as a nonwoven fabric are bonded together with an adhesive such as a hot melt adhesive, and a perforated sheet, net, or elongated shape is formed between the sheet layers 13 </ b> S. It is also preferable to form at least the tape expansion / contraction region 13E of the connecting tape 13 by using an elastic member 13G (thread-like or string-like) fixed in an extended state along the width direction WD. In this manner, a plurality of elongated elastic members 13G attached to the sheet layer 13S with a space therebetween are widely used in the technical field of the disposable diaper 10 and are not only easy to manufacture, but also include the elastic member 13G. There is also an advantage that the shrinkage characteristic of the connecting tape 13 can be easily adjusted by making the thickness, number, elongation rate, interval, and type of material different. In this case, as the material of the sheet layer 13S, the same material as the exterior sheet 12 can be used. Further, when an elongated member (thread-like or string-like) is used as the elastic member 13G, for example, about 5 to 15 members having a thickness of 420 to 1120 dtex can be provided at intervals of 3 to 10 mm in the front-rear direction.

  The tape stretchable region 13E is provided over the entire width direction WD of the connecting tape 13 (that is, including the attaching portion 13B and the connecting portion 13A) as long as it is provided at least in a portion between the attaching portion 13B and the connecting portion 13A. However, if the attachment portion 13B or the connection portion 13A contracts, the connection of the connection portion 13A may be insufficient, or a connection failure of the attachment portion 13B may occur. It is preferable to be provided in the range of 0 to 80% of the range in the width direction. In this case, the attachment portion 13B and the connection portion 13A may be regions without the elastic member 13G, but the elastic member 13G is attached over the entire width direction WD of the connection tape 13, and the attachment portion 13B and the connection portion 13A have the elastic member 13G. The elastic member 13G may remain in the attachment portion 13B and the connecting portion 13A by cutting or the like, but may have a structure that hardly or not expands or contracts at all.

  The connecting portion 13A of the expansion / contraction type connecting tape 13 can be provided on the sheet layer 13S constituting the tape expanding / contracting region 13E, but protrudes from the leading end of the tape expanding / contracting region 13E to the leading end of the connecting tape 13 as shown in the illustrated example. It is preferable to attach the support piece 13C and provide the connecting portion 13A on the support piece 13C because the manufacturing is easy. It is desirable that the support piece 13C has a connecting portion 13A in the middle of the width direction WD, and the tip portion is a knob that does not have the connecting portion 13A. The shape of the support piece 13C can be determined as appropriate, and in the illustrated example, the length in the front-rear direction is shortened toward the tip, and the connecting portion 13A is provided in the portion where the length in the front-rear direction is shortened. It can also be rectangular. When the support piece 13C has a rectangular shape, the length in the front-rear direction is preferably shorter than the sheet layer 13S constituting the tape stretchable region 13E. As the material of the support piece 13C, the same material as the non-expandable type can be used.

  The shape of the expansion / contraction type connecting tape 13 can be determined as appropriate, and it is preferable that the tape expansion / contraction region 13E is rectangular as shown in the illustrated example because it is easy to manufacture, but as the tape expansion / contraction region 13E moves toward the front end, the longitudinal direction It can also be a trapezoid that shortens the length of the LD. The dimensions of the expansion / contraction type connecting tape 13 can be determined as appropriate, but the length of the tape expansion / contraction region 13E in the front-rear direction LD is preferably about 20 to 100 mm, and the length of the tape expansion / contraction region 13E in the width direction WD is It is preferably about 0 to 90 mm.

(Target sheet)
It is preferable to provide a target sheet 20 having a target for facilitating connection at a connection portion of the connection tape 13 in the ventral portion F. When the connecting portion 13A is a hook material, the target sheet 20 can be one in which a large number of loop yarns are formed on the surface of a sheet base material made of a plastic film or a nonwoven fabric so that the engagement protrusions of the hook material are entangled. Moreover, in the case of an adhesive material layer, the surface of a sheet substrate made of a plastic film having a smooth surface that is rich in adhesiveness can be used. Moreover, when the connection location of the connection tape 13 in the ventral portion F is made of a nonwoven fabric, for example, when the exterior sheet 12 of the illustrated form is made of a nonwoven fabric, and the connection portion 13A of the connection tape 13 is a hook material, The target sheet 20 may be omitted, and the hook material may be entangled with the nonwoven fabric of the exterior sheet 12 and connected. In this case, the target sheet 20 may be provided between the exterior sheet 12 and the liquid-impermeable sheet 11.

(Widened part / width changing part)
Characteristically, as shown in FIGS. 1, 8, and 9, the side flap portion SF of the present tape-type disposable diaper 10 is folded back to the center in the width direction in the middle in the front-rear direction, and on the opposite surface by the fixing portion 82b. It has a fixed folded portion 82, and the portion that continues to the rear side of the folded portion 82 in the side flap portion SF is not fixed in the folded state at the center in the width direction, and can be expanded laterally. The widened portion 81 is formed. Further, the boundary between the folded portion 82 and the widened portion 81 is at a position away from the connecting tape 13 to the front side, and the attachment portion 13 </ b> B of the connecting tape 13 is located at the widened portion 81. As a result, in the expanded state, the widened portion 81 becomes the wing portion WP, and the expanded width of the widened portion 81 is the waist side (in this case, since the widened portion 81 is provided on the rear side of the diaper 10). A width changing portion (in the illustrated example, the entire wing portion WP is a width changing portion) that increases toward the rear end side. Since the side edge of the width changing portion is obliquely upward toward the side, the side edge of the wing portion WP is along the leg circumference, and the fit to the leg circumference is good, and the heel part is more extensive. Can be coated.

  The folded portion 82 is folded inward in the illustrated example, but may be folded outward.

  Since the width W1 of the folded portion 82 and the length L1 in the front-rear direction of the widened portion 81 affect the position of the width changing portion and the inclination of the side edge of the widened portion 81, it is preferable to determine this. In a normal case, the width W1 of the folded portion 82 is preferably about 0.6 to 0.75 times the longitudinal length L1 of the widened portion 81. More specifically, for infants, the width W1 of the folded portion 82 is preferably about 45 to 60 mm, and the length L1 of the widened portion 81 is preferably about 60 to 100 mm.

  In the example shown in FIGS. 1 and 2, the folded portion 82 is provided up to the front end of the ventral portion F. As a result, the wing portion WP is not formed in the ventral portion F. Similarly, the wing portion WP may be formed. That is, as shown in FIGS. 19 and 20, the folded portion 82 is only in the middle of the side flap portion SF in the front-rear direction LD (for example, only the crotch portion or the front-rear direction range including this) and continues to the rear side of the folded portion 82. In addition to the portion that is folded back, the portion that continues to the front side of the folded portion 82 is not fixed in a folded state in the center in the width direction, and is a widened portion 81 that can be expanded laterally. The front and rear widened portions 81 may be wing portions WP each having a width changing portion.

  When the folded portion 82 is provided up to the front end of the ventral portion F, the entire folded portion 82 may be fixed to the opposing surface, but the flexibility of the side flap portion SF may be impaired. On the other hand, like the fixing portion 82b in the example shown in FIG. 1, only the end portion on the center side in the width direction of the folded portion 82 may be fixed to the opposing surface, but the front end portion may open and the appearance may deteriorate. is there. Therefore, like the fixing portion 82b in the example shown in FIG. 16, the front end portion 82f of the folded portion 82 is fixed to the opposing surface over the entire width direction WD, and at the rear portion of the folded portion 82 from the front end portion 82f. It is preferable that only the end portion on the center side in the width direction is fixed to the facing surface continuously or intermittently in the front-rear direction LD.

  The position of the attachment portion 13B of the connecting tape 13 (attachment position of the connecting tape 13) in the wing portion WP (that is, the widened portion 81) is not particularly limited, but as shown in the examples shown in FIGS. At least a part (preferably the whole) of the attachment portion 13B of the connecting tape 13 is located in the changed portion, and the attachment of the connecting tape 13 is caused by a change in the expansion width of the widened portion 81 in the width changing portion in the expanded state. The portion 13B is contracted toward the center in the width direction toward the front side, whereby the connecting tape 13 is inclined obliquely downward toward the side. Thus, when the user pulls the connecting tape 13 at the time of wearing, the direction of the connecting tape 13 is naturally inclined downward, so that the connecting tape 13 is inclined downward along the lower side of the bulge of the wearer's abdomen. It becomes easy to connect. Such a wearing state is suitable after eating.

  Of course, as in the example shown in FIGS. 19 and 20, although the attachment portion 13B of the connecting tape 13 is located at the width changing portion, in the unfolded state, the attachment portion 13B of the connecting tape 13 is closer to the center in the width direction toward the front side. The connecting tape 13 can also be configured so as not to be inclined. Further, when the widened portion 81 has a non-width changing portion having a maximum developed width and a constant width, the connecting tape 13 is not inclined by positioning the entire attachment portion 13B of the connecting tape 13 in the non-width changing portion. It can also be in the form.

The folded portion 82 can be formed by a part or all of the sheet constituting the side flap portion SF. However, as the number of laminated sheets of the folded portion 82 and the widened portion 81 increases, the air permeability and flexibility decrease. Therefore, it is preferable that the number of laminated sheets of the folded portion 82 and the widened portion 81 is small, and the folded portion 82 and the widened portion. It is preferable that the material of the 81 sheets is flexible. Specifically, in the case of the illustrated example, the exterior sheet 12 can be made of a flexible and breathable material such as an air-through nonwoven fabric having a basis weight of about 15 to 30 g / m ² . It is desirable to make the width wider than other materials and to form the folded portion 82 and the widened portion 81 by the side portions. On the other hand, since the liquid-impermeable sheet 11 is one of hard materials, the width is narrowed so that the side edge is located on the center side in the width direction with respect to the folded position of the folded portion 82, and the folded portion 82 and the widened portion. It is desirable to configure 81 so as not to include the liquid-impermeable sheet 11. Further, the gather sheet 62 is rich in flexibility and air permeability as compared with the liquid-impermeable sheet 11, but is required to have a certain degree of water shielding, so that it is inferior in flexibility and air permeability as compared with the exterior sheet 12. is there. Therefore, the gather sheet 62 is also narrowed so that the side edge thereof is located on the center side in the width direction with respect to the folded position of the folded portion 82, and the gather sheet 62 is gathered to the folded portion 82 and the widened portion 81. It is desirable that the sheet 62 is not included. In this case, in order to further suppress the decrease in air permeability and flexibility, it is also preferable that the gather sheet 62 extends only to the end portion on the center side in the width direction of the folded portion 82 as shown in FIG.

  Of course, as in the example shown in FIG. 13, not only the exterior sheet 12 but also the gather sheet 62 constituting the side flap portion SF is widened, and the exterior sheet 12 and the gather sheet 62 are bonded together to fold the folded portion 82 and the widened portion. The part 81 can also be formed. In this case, the strength of the widened portion 81 is high, but the air permeability and flexibility are low as compared with the case where the folded portion 82 and the widened portion 81 are formed without including the gather sheet 62.

  The connecting tape 13 can be fixed to the inner surface in the expanded state in the widened portion 81, but depending on the material of the connecting tape 13, the touch may be deteriorated. It is also preferable to fix to the surface which becomes an outer surface in the expansion | deployment state in the part 81. FIG. When the exterior sheet 12 and the gather sheet 62 are bonded together to form the folded portion 82 and the widened portion 81 as in the example illustrated in FIG. 13, the exterior sheet 12 in the widened portion 81 is formed as in the example illustrated in FIG. In addition, the end portion of the connecting tape 13 may be sandwiched between the gather sheets 62 and fixed.

  As in the example shown in FIG. 13, when the folded portion 82 and the widened portion 81 are formed by bonding the exterior sheet 12 and the gather sheet 62, the widened portion 81 has high strength, and therefore the connecting tape 13 is connected to the widened portion 81. Suitable for fixing to. On the other hand, as shown in FIG. 14, when the folded portion 82 and the widened portion 81 are formed only by the exterior sheet 12, the connecting tape 13 is connected to the widened portion 81 due to insufficient strength of the widened portion 81. If fixed to, the widened portion 81 may be plastically deformed or broken in use.

  However, as shown in the illustrated example, when the waist stretchable sheet 90 that expands and contracts in the width direction WD is provided over the portion of the back side portion B that overlaps the attachment portion 13B of both the connecting tapes 13, a portion to which force is applied during use In particular, the waist stretchable sheet 90 can supplement the strength of the fixing target of the attachment portion 13B of the connecting tape 13. Moreover, since the tightening force in the mounting state concentrated on the connecting tape 13 and the tensile force at the time of mounting are directly transmitted to the waist stretchable sheet 90, the stretchability of the waist stretchable sheet 90 is more suitably exhibited.

  At the time of manufacture, as in the example shown in FIG. 17, after finishing the attachment of the sheets 12 and 62 constituting the side flap portion SF, the sheet (the exterior sheet 12 in the illustrated example) that becomes the folded portion 82 and the widened portion 81 is attached. Prior to folding, the attachment portion 13B of the connecting tape 13 is attached to the center in the width direction WD from the folding position fp. Thereafter, the sheet that becomes the folded portion 82 and the widened portion 81 together with the connecting tape 13 is folded back to the center in the width direction as indicated by the arrows in the figure, and only the portion that becomes the folded portion 82 is fixed to the opposing surface by the fixing portion 82b. The part which becomes 81 is not fixed to the opposing surface. The sheet that becomes the folded portion 82 and the widened portion 81 can be folded outward, but is folded inward as shown in the example, and the connecting portion 13A of the connecting tape 13 of the widened portion 81 is opposed to the sheet as shown in FIG. It can be temporarily fixed to the surface in a detachable manner. Further, as in the example shown in FIG. 15, in the form in which the connecting tape 13 has the support piece 13 </ b> C, prior to the folding of the sheet to be the folded portion 82 and the widened portion 81, the base end side of the connecting portion 13 </ b> A in the support piece 13 </ b> C. The tip side can also be folded back at this position. In the product manufactured in this way, when the connecting tape 13 is only opened to the side in use, as shown in FIGS. 1 and 19, the widened portion 81 is expanded to the side and the folded portion 82 is not expanded. The widened portion 81 becomes the wing portion WP, and the wing portion WP has a width changing portion in which the developed width of the widened portion 81 increases toward the waist.

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.
・ "Longitudinal direction LD (vertical direction)" means the direction connecting the ventral side (front side) and back side (rear side), and "width direction WD" means the direction (left and right direction) orthogonal to the front and rear direction. The “thickness direction TD” means a direction orthogonal to the front surface and the back surface.
・ "Front side" means the side closer to the skin when worn, and "Back side" means the side far from the skin when worn.
-“Deployed state” means a state in which a natural length is extended and completely flattened without contraction or sagging.
“Elongation rate” means a value when the natural length is 100%.
-"Gel strength" is measured as follows. Add 1.0 g of superabsorbent polymer to 49.0 g of artificial urine and stir with a stirrer. The produced gel is left in a constant temperature and humidity chamber of 40 ° C. × 60% RH for 3 hours and then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500, manufactured by I.techno Engineering).
"Artificial urine" is urea: 2 wt%, sodium chloride: 0.8 wt%, calcium chloride dihydrate: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, and ion-exchanged water: 97 0.09 wt% mixed, and used at a temperature of 37 degrees unless otherwise specified.
・ "Weight" is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 23 ± 1 ° C., relative humidity 50 ± 2%) to a constant weight. Pre-drying refers to making a sample or test piece constant in an environment at a temperature of 100 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. From the test piece in a constant weight state, a sample plate (100 mm × 100 mm) is used to cut a sample having a size of 100 mm × 100 mm. The weight of the sample is measured, multiplied by 10, and the weight per square meter is calculated and used as the basis weight.
-"Water absorption" is measured by JIS K7223-1996 "Test method for water absorption of superabsorbent resin".
・ "Water absorption rate" is "Time to end point" when JIS K7224-1996 "Water absorption rate test method for superabsorbent resin" is performed using 2 g of superabsorbent polymer and 50 g of physiological saline. And
・ If there is no description about the environmental conditions in the test and measurement, the test and measurement shall be performed in a standard laboratory (test location: temperature 23 ± 1 ° C, relative humidity 50 ± 2%) in a test room or equipment. To do.
-Unless otherwise specified, the dimensions of each part mean dimensions in a deployed state, not a natural length state.

  The present invention is applicable to a tape-type disposable diaper as in the above example.

  DESCRIPTION OF SYMBOLS 10 ... Tape type disposable diaper, 11 ... Liquid impervious sheet, 12 ... Exterior sheet, 13 ... Connection tape, 13A ... Connection part, 13B ... Attachment part, 13C ... Support piece, 13E ... Tape expansion-contraction area, 13F ... Tape free Part, 20 ... target sheet, 30 ... top sheet, 40 ... intermediate sheet, 50 ... absorbent element, 56 ... absorbent, 58 ... packaging sheet, 60 ... rising gather, 62 ... gather sheet, 63 ... gather elastic member, 70 ... Side elastic member, 81 ... widened portion, 82 ... folded portion, 90 ... waist elastic sheet, 95 ... intermediate elastic region, 96 ... non-elastic region, B ... dorsal side part, MP ... body part, EF ... end flap part, F ... ventral part, LD ... longitudinal direction, SF ... side flap part, TD ... thickness direction, WD ... width direction, WP ... wing part, C ... crotch part.

Claims (8)

Having a crotch portion including a front-rear direction center, a ventral portion extending frontward from the front-rear direction center, and a dorsal side portion extending rearward from the front-rear direction center,
Having an absorbent body built in a range including the crotch part,
On both sides in the width direction from the ventral portion to the dorsal portion, side flap portions not having the absorber,
At least the back side portion has a wing portion that extends to the left and right sides in the width direction from the crotch portion,
An attachment portion fixed to the wing portion; a tape free portion extending laterally from the attachment portion; and a connection tape having a connection portion for the ventral portion provided in the tape free portion;
In the mounted state, in the tape-type disposable diaper in which the connecting tape of the wing portion is connected to the outer surface of the ventral portion,
The side flap portion has a folded portion that is folded back to the center in the width direction and fixed to the facing surface in the middle in the front-rear direction,
The portion that continues to the rear side of the folded portion in the side flap portion is not fixed in a state folded back to the center in the width direction, and is a widened portion that can be expanded laterally.
The boundary between the folded portion and the widened portion is at a position away from the connecting tape to the front side,
The mounting portion in the connecting tape is located in the widened portion,
In the unfolded state, the widened portion becomes the wing portion, and the wing portion has a width changing portion that increases as the unfolded width of the widened portion goes toward the waist.
A tape-type disposable diaper characterized by that. At least a part of the front side of the attachment portion in the connecting tape is fixed to the width changing portion,
In the unfolded state, due to the change in the unfolded width of the widened portion in the width varying portion, the attachment portion is contracted to the center in the width direction toward the front side, whereby the connecting tape is inclined downward toward the side.
The tape-type disposable diaper according to claim 1. The folded portion is provided up to the front end of the ventral portion, the front end portion of the folded portion is fixed to the opposing surface over the entire width direction, and the front and rear portions of the folded portion on the rear side of the front end portion Only the end on the center side in the width direction is fixed to the opposing surface continuously or intermittently in the direction,
The tape-type disposable diaper according to claim 1 or 2. A liquid-impermeable sheet covering the back side of the absorber;
An exterior sheet covering the back side of the liquid-impermeable sheet;
A root portion fixed to a region including the side flap portion, a protruding portion extending from the root portion, a lying portion in which both front and rear direction ends of the protruding portion are fixed in a lying state, and the front and rear of the protruding portions A gathering sheet having a gather sheet having an unfixed rising part located between the lying parts, and a gather elastic member fixed to at least a tip part of the rising part,
With
In the side flap portion, the gather sheet, the liquid-impermeable sheet, and the exterior sheet are laminated,
The folded portion and the widened portion include the side portion of the exterior sheet, do not include the liquid impermeable sheet, and the side edge of the liquid impermeable sheet is closer to the center in the width direction than the folded position of the folded portion. positioned,
The tape-type disposable diaper according to claim 3. The folded portion and the widened portion do not include the gather sheet, and the side edge of the gather sheet is located on the center side in the width direction from the folded position of the folded portion.
The tape-type disposable diaper according to claim 4. The gather sheet extends only to the end on the width direction center side of the folded portion,
The tape-type disposable diaper according to claim 5. The connection tape has an attachment portion fixed to the wing portion, a tape free portion extending laterally from the attachment portion, and a connection portion for the ventral portion provided in the tape free portion. ,
Over the part that overlaps the base end of both connecting tapes, a waist elastic sheet that expands and contracts in the width direction is provided,
The tape-type disposable diaper according to claim 6. The connecting tape is fixed to a surface which is an outer surface in the expanded state in the widened portion,
The tape type disposable diaper of any one of Claims 4-7.

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